Best Seller | Tiny portable dual-frequency RFID field detector by Proxgrind Introduction The RFID Field Detector detects and displays the presence of Low Frequency (125KHz) and High Frequency (13.56MHz) fields. Designed to be compact and discrete it fits neatly onto your keyring. The RFID Field Detector is an indispensable... more | | $15.93 FREE shipping go to store |